// 导入路由脚本文件中属性
import { asyncRoutes, constantRoutes } from '@/router'
// 导入获取菜单数据的方法
import { getMenuList } from '@/api/user'
// 导入Layout组件
import Layout from '@/layout'

/**
 * 判断当前登录用户是否拥有该角色下的菜单信息
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * 过滤所拥有的菜单信息
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = { ...route }
    //判断是否拥有相应的权限
    if (hasPermission(roles, tmp)) {
      //获取该路由对应的组件
      let component = tmp.component;
      // 判断是否有组件
      if(route.component) {
        //判断是否是根组件
        if(component === 'Layout') {
          tmp.component = Layout;
        } else {
          //获取对应的具体的组件信息
          tmp.component = (resolve) => require([`@/views${component}`],resolve)
        }
      }
      //判断是否有子菜单
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  //将路由信息保存到store中
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  //动态生成路由
  generateRoutes({ commit }, roles) {
    return new Promise((resolve,reject) => {
      //发送查询菜单树的请求
      getMenuList().then(resp => {
        // console.log(resp, '动态路由信息')
        //存放对应权限的路由信息
        let accessedRoutes
        if(resp.code === 200) {
          //先写成asyncRoutes，改造完filterAsyncRoutes方法后将其改为resp.data
          accessedRoutes = filterAsyncRoutes(resp.data, roles)
        }
        // 将路由信息保存到store中
        commit('SET_ROUTES', accessedRoutes)
        resolve(accessedRoutes)
      }).catch(error => {
        reject(error);
      })
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
